Jesper Ahrenfeldt

  1. 2014
  2. Published

    Gas cleaning with hot char beds studied by stable isotopes. / Egsgaard, Helge; Ahrenfeldt, Jesper; Ambus, Per; Schaumburg, K.; Henriksen, Ulrik Birk.

    In: Journal of Analytical and Applied Pyrolysis, Vol. 107, 2014, p. 174-182.

    Publication: Research - peer-reviewJournal article – Annual report year: 2014

  3. 2013
  4. Published
  5. Published
  6. Published
  7. Published
  8. Published

    Intrinsic kinetics and devolatilization of wheat straw during torrefaction. / Shang, Lei; Ahrenfeldt, Jesper; Holm, Jens Kai; Barsberg, Søren; Luo, Yong-hao; Egsgaard, Helge; Henriksen, Ulrik Birk.

    In: Journal of Analytical and Applied Pyrolysis, Vol. 100, 2013, p. 145-152.

    Publication: Research - peer-reviewJournal article – Annual report year: 2013

  9. Published

    Lab and Bench-Scale Pelletization of Torrefied Wood Chips : Process Optimization and Pellet Quality. / Shang, Lei; Nielsen, Niels Peter K. ; Stelte, Wolfgang; Dahl, Jonas; Ahrenfeldt, Jesper; Holm, Jens Kai; Puig Arnavat, Maria; Bach, Lars Stougaard; Henriksen, Ulrik Birk.

    In: Bioenergy Research, Vol. 7, No. 1, 2013, p. 87-94.

    Publication: Research - peer-reviewJournal article – Annual report year: 2013

  10. Published
  11. Published

    TwoStage gasification of biomass for clean syngas: Technology and applications. / Ahrenfeldt, Jesper (Author).

    2013. DTU International Energy Conference 2013, Lyngby, Denmark, 10/09/13.

    Publication: ResearchSound/Visual production (digital) – Annual report year: 2013

  12. Published

    Upgrading Fuel Properties of Biomass by Torrefaction. / Shang, Lei; Ahrenfeldt, Jesper (Main supervisor); Henriksen, Ulrik Birk (Supervisor); Holm, Jens Kai.

    Technical University of Denmark, Department of chemical and Biochemical Engineering, 2013. 146 p.

    Publication: ResearchPh.D. thesis – Annual report year: 2013

  13. 2012
  14. Published

    Assessment of a novel alder biorefinery concept to meet demands of economic feasibility, energy production and long term environmental sustainability. / Thomsen, Tobias (Author); Thomsen, Sune Tjalfe (Author); Ahrenfeldt, Jesper (Author).

    2012. 20th European Biomass Conference and exhibition, Milan, Italy, 18/06/12.

    Publication: ResearchSound/Visual production (digital) – Annual report year: 2012

  15. Published

    Assessment of a novel alder biorefinery concept to meet demands of economics feasibility, energy production and long term environmental sustainability. / Thomsen, Tobias; Ahrenfeldt, Jesper; Thomsen, Sune Tjalfe.

    Proceedings of the 20th European Biomass Conference and Exhibition. ETA-Florence Renewable Energies, 2012. p. 700-707.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

  16. Published

    Changes of chemical and mechanical behavior of torrefied wheat straw. / Shang, Lei; Ahrenfeldt, Jesper; Holm, Jens Kai; Sanadi, Anand Ramesh; Barsberg, Søren Talbro; Thomsen, Tobias; Stelte, Wolfgang; Henriksen, Ulrik B.

    In: Biomass & Bioenergy, Vol. 40, 2012, p. 63-70.

    Publication: Research - peer-reviewJournal article – Annual report year: 2012

  17. Published

    Energy efficiency improvements in energy supply and industry. / Abildskov, Jens; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Jappe Frandsen, Flemming.

    DTU International Energy Report 2012: Energy efficiency improvements: A key element in the global transition to non-fossil energy. Technical University of Denmark, 2012. p. 79-85.

    Publication: Research - peer-reviewReport chapter – Annual report year: 2012

  18. Published

    Fuel Pellets from Wheat Straw: The Effect of Lignin Glass Transition and Surface Waxes on Pelletizing Properties. / Stelte, Wolfgang; Clemons, Craig; Holm, Jens K.; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Sanadi, Anand R.

    In: Bioenergy Research, Vol. 5, 2012, p. 450-458.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  19. Published

    Quality effects caused by torrefaction of pellets made from Scots pine. / Shang, Lei; Nielsen, Niels Peter K.; Dahl, Jonas; Stelte, Wolfgang; Ahrenfeldt, Jesper; Holm, Jens Kai; Thomsen, Tobias; Henriksen, Ulrik B.

    In: Fuel Processing Technology, Vol. 101, 2012, p. 23-28.

    Publication: Research - peer-reviewJournal article – Annual report year: 2012

  20. Published

    Quality of pellets from torrefied biomass and pellets torrefied at different temperatures. / Shang, Lei; Dahl, Jonas; Ahrenfeldt, Jesper; Holm, Kens Kai; Nielsen, Niels Peter K.; Stelte, Wolfgang; Thomsen, Tobias; Bach, Lars Stougaard; Henriksen, Ulrik Birk.

    2012. Poster session presented at 2012 EU BC&E, Milan, Italy.

    Publication: Research - peer-reviewPoster – Annual report year: 2012

  21. Published

    Recent Developments in Biomass Pelletization - A Review. / Stelte, Wolfgang; Sanadi, Anand R.; Shang, Lei; Holm, Jens K.; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    In: BioResources, Vol. 7, No. 3, 2012, p. 4451-4490.

    Publication: Research - peer-reviewJournal article – Annual report year: 2012

  22. Published
  23. 2011
  24. Published

    A study of bonding and failure mechanisms in fuel pellets from different biomass resources. / Stelte, Wolfgang; Holm, Jens K.; Sanadi, Anand R.; Barsberg, Søren; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    In: Biomass & Bioenergy, Vol. 35, No. 2, 2011, p. 910-918.

    Publication: Research - peer-reviewJournal article – Annual report year: 2010

  25. Published

    Fuel pellets from biomass: The importance of the pelletizing pressure and its dependency on the processing conditions. / Stelte, Wolfgang; Holm, Jens K.; Sanadi, Anand R.; Barsberg, Søren; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    In: Fuel, Vol. 90, No. 11, 2011, p. 3285-3290.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  26. Published

    Fuel pellets from torrefied biomass. / Stelte, Wolfgang; Clemons, C.; Holm, J.K.; Sanadi, A.R.; Shang, Lei; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    2011. Poster session presented at World Sustainable Energy Days, European Pellets Conference, Wels (AT), 29 Feb - 3 Mar, .

    Publication: ResearchPoster – Annual report year: 2011

  27. Published

    Fuel pellets from torrefied biomass. / Stelte, Wolfgang; Clemons, C.; Holm, J.K.; Sanadi, A.R.; Shang, Lei; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    2011. Poster session presented at Biomass Pelletization Workshop, University of British Columbia, Vancouver (CA), 17-18 May, .

    Publication: ResearchPoster – Annual report year: 2011

  28. Published

    LT-CFB. Videreudvikling og kommercialisering : Slutrapport for PSO-ForskEl projekt nr. 2007-7504. / Stoholm, Peder; Henriksen, Ulrik Birk; Ahrenfeldt, Jesper; Cramer, Jesper; Dietrich, Jørn; Christiansen, Knud; Krogh, Jørgen.

    DFBT, 2011. 60 p.

    Publication: ResearchReport – Annual report year: 2012

  29. Published

    Optimization of a multi-parameter model for biomass pelletization to investigate temperature dependence and to facilitate fast testing of pelletization behavior. / Holm, Jens Kai; Stelte, Wolfgang; Posselt, Dorthe; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    In: Energy & Fuels, Vol. 25, No. 8, 2011, p. 3706-3711.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  30. Published

    Pelletizing Properties of Torrefied Biomass. / Stelte, Wolfgang; Clemons, Craig; Holm, Jens K.; Sanadi, Anand R.; Ahrenfeldt, Jesper; Shang, Lei; Henriksen, Ulrik Birk.

    2011. Abstract from 19th European Biomass Conference and Exhibition, Berlin, Germany.

    Publication: ResearchConference abstract for conference – Annual report year: 2011

  31. Published

    Pelletizing properties of torrefied spruce. / Stelte, Wolfgang; Clemons, Craig; Holm, Jens K.; Sanadi, Anand R.; Ahrenfeldt, Jesper; Shang, Lei; Henriksen, Ulrik Birk.

    In: Biomass & Bioenergy, Vol. 35, No. 11, 2011, p. 4690-4698.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  32. Published

    Production of methanol/DME from biomass : EFP06. / Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Münster-Swendsen, Janus; Fink, Anders; Clausen, Lasse Røngaard; Christensen, Jakob Munkholt; Qin, Ke; Lin, Weigang; Jensen, Peter Arendt; Jensen, Anker Degn.

    Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. 260 p. (CHEC; No. R1107).

    Publication: Research - peer-reviewReport – Annual report year: 2011

  33. Published

    The potential of pyrolysis technology in climate change mitigation – influence of process design and –parameters, simulated in SuperPro Designer Software. / Thomsen, Tobias; Hauggaard-Nielsen, Henrik; Bruun, Esben; Ahrenfeldt, Jesper.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2011. 115 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1764(EN)).

    Publication: ResearchReport – Annual report year: 2011

  34. Published

    Thermal transitions of the amorphous polymers in wheat straw. / Stelte, Wolfgang; Clemons, Craig; Holm, Jens K.; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Sanadi, Anand R.

    In: Industrial Crops and Products, Vol. 34, No. 1, 2011, p. 1053-1056.

    Publication: Research - peer-reviewJournal article – Annual report year: 2011

  35. Published
  36. 2010
  37. Published

    Binding mechanisms in fuel pellets made from biomass. / Stelte, Wolfgang; Henriksen, Ulrik Birk; Ahrenfeldt, Jesper.

    2010. Poster session presented at FPS 64th International Convention : Annual meeting of the Forest Products Society, Madison, Wisconsin, USA, .

    Publication: ResearchPoster – Annual report year: 2010

  38. Published

    Bio-SNG potential assessment: Denmark 2020. / Ahrenfeldt, Jesper; Jørgensen, Betina; Thomsen, Tobias.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. 87 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1754(EN)).

    Publication: ResearchReport – Annual report year: 2010

  39. Published

    Development and Test of a new Concept for Biomass Producer Gas Engines. / Ahrenfeldt, Jesper; Foged, Esben Vendelbo; Strand, Rune; Henriksen, Ulrik Birk.

    Roskilde : Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi, 2010. 35 p. (Denmark. Forskningscenter Risoe. Risoe-R; No. 1728(EN)).

    Publication: ResearchReport – Annual report year: 2010

  40. Published

    On the significance of methyl chloride in gasification processes. / Egsgaard, Helge; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    Proceedings. 2010. p. 590-592.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2010

  41. Published

    Tar removal from low-temperature gasifiers. / Zwart, Robil; van der Heijden, Simon; Emmen, Rob; Dall Bentzen, Jens; Ahrenfeldt, Jesper; Stoholm, Pder; Krogh, Jørn.

    Petten : Energy Research Centre of the Netherlands (ECN), 2010. 73 p. (ECN-E-10-008).

    Publication: ResearchReport – Annual report year: 2010

  42. 2008
  43. Published
  44. Published

    Char reactivity of different kind of BIOMASS pellets under overheated steam gasification conditions. / Gomez, A; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    Char reactivity of different kind of BIOMASS pellets under overheated steam gasification conditions. 2008. p. VP2.2.26.

    Publication: ResearchArticle in proceedings – Annual report year: 2008

  45. Published

    Produktion af methanol/DME ud fra biomasse. / Ahrenfeldt, Jesper.

    2008. Paper presented at EnergiForsk 2008, København, Denmark.

    Publication: ResearchPaper – Annual report year: 2008

  46. Published

    The Low Temperature CFB gasifier –500 kW test on biogas fiber residue. / Ahrenfeldt, Jesper.

    The Low Temperature CFB gasifier –500 kW test on biogas fiber residue. 2008.

    Publication: ResearchArticle in proceedings – Annual report year: 2008

  47. 2007
  48. Published

    High temperature electrolyte supported Ni-GDC/YSZ/LSM SOFC operation on two-stage Viking gasifier product gas. / Hofmann, P.; Schweiger, A.; Fryda, L.; Panopoulos, K.D.; Hohenwarter, U.; Bentzen, Jens Dall; Ouweltjes, J.P.; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Kakaras, E.

    In: Journal of Power Sources, Vol. 173, No. 1, 2007, p. 357-366.

    Publication: Research - peer-reviewJournal article – Annual report year: 2007

  49. 2006
  50. Published

    The design, construction and operation of a 75kW two-stage gasifier. / Henriksen, Ulrik Birk; Ahrenfeldt, Jesper; Jensen, Torben Kvist; Gøbel, Benny; Bentzen, Jens Dall; Hindsgaul, Claus; Sørensen, Lasse Holst.

    In: Energy, Vol. 31, No. 10-11, 2006, p. 1542-1553.

    Publication: Research - peer-reviewJournal article – Annual report year: 2006

  51. Published

    The Influence of Sulfur on Natural Gas Combustion. / Andersen, Jimmy; Glarborg, Peter; Lin, Weigang; Bruni, Emiliano; Ahrenfeldt, Jesper; Henriksen, Ulrik Birk.

    2006. Poster session presented at 31st International Symposium on Combustion, Heidelberg, Germany.

    Publication: ResearchPoster – Annual report year: 2006

  52. Published

    Validation of Continuous CHP Operation of a Two-Stage Biomass Gasifier. / Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Jensen, Torben Kvist; Gøbel, Benny; Wiese, Lars; Kather, Alphons; Egsgaard, Helge.

    In: Energy and Fuels, 2006.

    Publication: Research - peer-reviewJournal article – Annual report year: 2006

  53. 2005
  54. Published

    CO and PAH emissions from engines operating on producer gas. / Ahrenfeldt, Jesper.

    Handbook Biomass Gasification. Vol. 1 1. ed. Enschede : BTG biomass tecnology group, 2005. p. 284-297.

    Publication: ResearchBook chapter – Annual report year: 2005

  55. Published

    Experimental characterisation of residual-tar in wood char. / Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Gøbel, Benny; Fjellerup, Jan Søren.

    Lyngby : DTU Mekanik, 2005. 20 p. (MEK-ET-2005-06).

    Publication: ResearchReport – Annual report year: 2005

  56. Published

    Formation, Decomposition and Cracking of Biomass Tars in Gasification. / Fjellerup, Jan; Ahrenfeldt, Jesper; Henriksen, Ulrik; Gøbel, Benny.

    Kgs.Lyngby : Technical University of Denmark. Department of Mechanical Engineering, 2005. 60 p.

    Publication: ResearchReport – Annual report year: 2005

  57. Published

    Investigation of Continuous Gas Engine CHP Operation on Biomass Producer Gas. / Ahrenfeldt, Jesper; Jensen, Torben Kvist; Henriksen, Ulrik Birk; Schramm, Jesper.

    In: S A E Transactions, Vol. 114, No. 4, 2005, p. 1464-1475.

    Publication: Research - peer-reviewJournal article – Annual report year: 2006

  58. Published

    Investigation of Continuous Gas Engine CHP Operation on Biomass Producer Gas. / Ahrenfeldt, Jesper; Henriksen, Ulrik Birk; Jensen, Torben Kvist; Schramm, Jesper.

    Proceedings of Powertrain & Fluid Systems Conference & Exhibition: SAE Technical Paper. 2005. p. 2005-01-3778.

    Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2005

  59. Published

    Langtidsforsøg med totrinsforgasseren "Viking". / Henriksen, Ulrik Birk; Ahrenfeldt, Jesper; Bentzen, Jens Dall.

    Kgs.Lyngby : Institut for Mekanik, Energi og Konstruktion, 2005. 59 p. (MEK-ET-2005-07).

    Publication: ResearchReport – Annual report year: 2005

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